In response to review, AndreaNwEngland says ...

I spoke extensively to Celebrity before the cruise btw. And it gets so tedious to stand around waiting--for a veggie burger at the grill, for some soymilk at breakfast etc. In St. Kitts, we totally missed our morning excursion because they made us so late getting off the boat.

We are planning to cruise Alaska next summer, and I think we'll give Princess a try. But I agree with the OP that it's about managed (lowered) expectations at this point. Of course you don't have that luxury when it's a medical necessity.

Although not a vegan, my husband can eat very little protein and needs to eat mostly vegetables and fruits and little sodium. His diet though doesn't need any unusual ingredients. On all our Celebrity ships, his diet was easily accommodated for the most part. If not, the chef made him a special pasta dish with little protein. The difficulty was as you said waiting to get the menu and have whoever takes your order for the next day available to you. If would help matters if special request passengers could get the lunch and dinner menus at the start of the cruise and make their selections and alterations ahead of time. Even doing it over the TV would be a help It it is awkward doing all the conferring when sitting at a table with others. You wait longer to get your meal and longer to leave because you are always waiting to discuss tomorrow's meals. Occasionally they even misplace the requests on some cruiselines. At least they try for which my husband is grateful. My husband's diet is a medical necessity and he could not cruise if he wasn't able to be accommodated.